STUDY ONLINE FIRST A Crossover Trial Investigating Children’s Sunscreen Application Thickness and the Influence of Age and Dispenser Type Abbey Diaz, MAppSc; Rachel E. Neale, PhD; Michael G. Kimlin, PhD; Lee Jones, BStats; Monika Janda, PhD Objectives: To measure the thickness at which pri- Main Outcome Measure: Thickness of sunscreen ap- mary schoolchildren apply sunscreen on school day morn- plication (in milligrams per square centimeter). The dis- ings and to compare it with the thickness (2.00 mg/ pensers were weighed before and after use to calculate cm ) at which sunscreen is tested during product the weight of sunscreen applied. This was divided by the development, as well as to investigate how application coverage area of application (in square centimeters), which thickness was influenced by age of the child (school grades was calculated by multiplying the children’s body sur- 1-7) and by dispenser type (500-mL pump, 125-mL face area by the percentage of the body covered with sun- squeeze bottle, or 50-mL roll-on). screen. Design: A crossover quasiexperimental study design com- Results: Children applied their sunscreen at a median paring 3 sunscreen dispenser types. thickness of 0.48 mg/cm . Children applied signifi- cantly more sunscreen when using the pump
JAMA Dermatology – American Medical Association
Published: May 1, 2012
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